/*
Copyright (C) 2003  Pierrick Brihaye
pierrick.brihaye@wanadoo.fr

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the
Free Software Foundation, Inc.
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
or connect to:
http://www.fsf.org/copyleft/gpl.html
*/

package gpl.pierrick.brihaye.aramorph.lucene;

import org.apache.lucene.analysis.TokenStream;

/**
 * Normalizes token text to whitespaces
 */
public final class WhitespaceFilter extends ArabicNormalizer {
	
	public WhitespaceFilter(TokenStream input) {
		super(input);
	}

	@Override
	protected String clean(String text) {
		String cleaned = text.trim();
		return cleaned.length() == 0? null : cleaned;
	}

}
